US4592670A - Angular motion paper feed release system - Google Patents

Angular motion paper feed release system Download PDF

Info

Publication number
US4592670A
US4592670A US06/626,362 US62636284A US4592670A US 4592670 A US4592670 A US 4592670A US 62636284 A US62636284 A US 62636284A US 4592670 A US4592670 A US 4592670A
Authority
US
United States
Prior art keywords
paper feed
platen
feed
leaf spring
plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/626,362
Other languages
English (en)
Inventor
Edgar H. Frank
Steven R. Komplin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IBM Information Products Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION reassignment INTERNATIONAL BUSINESS MACHINES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FRANK, EDGAR H., KOMPLIN, STEVEN R.
Priority to US06/626,362 priority Critical patent/US4592670A/en
Priority to JP60022148A priority patent/JPS6114971A/ja
Priority to CA000478653A priority patent/CA1221995A/en
Priority to BR8502593A priority patent/BR8502593A/pt
Priority to EP85107137A priority patent/EP0167025B1/en
Priority to DE8585107137T priority patent/DE3565494D1/de
Priority to ES544675A priority patent/ES8607830A1/es
Publication of US4592670A publication Critical patent/US4592670A/en
Application granted granted Critical
Assigned to IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE reassignment IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD AVENUE, GREENWICH, CT 06830 A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INTERNATIONAL BUSINESS MACHINES CORPORATION
Assigned to MORGAN BANK reassignment MORGAN BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: IBM INFORMATION PRODUCTS CORPORATION
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/02—Rollers
    • B41J13/036—Rollers co-operating with a roller platen

Definitions

  • This invention relates to typewriter and printer paper feeds and particularly to the pressure feed roll/rotary platen type of paper feeds.
  • the simplification of paper feeds is a goal in the design of any typewriter or printer, so long as they may be simplified without reducing reliability in feeding the paper.
  • a self-aligning and non-adjustable paper feed mechanism is of primary interest.
  • the self-alignment eliminates the need for precise positioning of the paper feed assembly while non-adjustable paper feeds eliminate the expense of manufacturing the adjustment capacity into the paper feed and the expense of performing the adjustments.
  • Simple release controls eliminate assembly problems and thereby tend to reduce manufacturing and assembly costs.
  • the need for a simpler mechanism is dictated by costs and reliability together with the need to automate the assembly of apparatus such as typewriters and printers to be cost effective in the marketplace.
  • a self-aligning paper feed for a typewriter is disclosed in U.S. Pat. No. 4,364,683 to I. D. Shakib et al.
  • the release of the paper feed disclosed in the Shakib et al patent depends upon the release bail engaging a release surface and pulling the feed roll assembly away from the platen to allow insertion of the paper or movement of the paper with respect to the platen.
  • the paper feed of the Epson MX80F/T printer is one where a bail has coaxially mounted thereon a pair of feed rolls spaced apart slightly and positioned roughly at the mid point of the bail.
  • the bail is pulled by a spring into a slot in the frame and maintained in that position by a spring.
  • the end of the slot acts as a fulcrum for the bail while the opposite end of the bail is engaged by a control lever and can be forced generally radially outward from the platen axis.
  • the feed rolls being mounted at approximately the midpoint of the bail, will then move outward, also in a generally radial direction from the axis of the platen by approximately half the distance the free end of the bail is translated.
  • a self-aligning feed roll assembly is supported on a feed roll bar such that the feed roll bar may be lowered at one end to relieve the engagement between the feed rolls, on the feed roll assembly, and the periphery of the platen and thereby release paper from the printer.
  • the movement of the paper feed bar is accomplished by a camming member with the cam surface engaging the platen shaft thereby moving the cam generally downward in response to the camming member being pulled forward by the operator.
  • the downward movement of the cam pushes the paper feed bar down and away from the platen, thus relieving the feed roll assembly from the surface of the platen by lowering it.
  • FIG. 1 is a partially cutaway perspective view of the paper feed assembly.
  • FIG. 2 is a front view of the paper feed assembly showing the paper feed rolls, the paper feed roll assembly, the paper feed bar, and the engaged and the withdrawn positions.
  • FIG. 3 is an end view of the paper feed assembly in the engaged position.
  • FIG. 4 is an end view of the paper feed assembly with the paper feed roll assembly in its withdrawn position.
  • FIG. 5 is an enlarged perspective view of the portion of the paper feed bar which engages the paper feed roll assembly.
  • FIG. 1 is a partial cutaway view of the paper feed mechanism
  • a platen 10 is positioned such that platen shaft 12 is supported by frame 14.
  • Frame 14 provides the rigid support necessary to precisely position platen 10 relative to the remainder of the typewriter or printer.
  • feed rolls 16, 18 are biasingly engaged with the periphery of the platen 10 on the lower portion of the platen's periphery.
  • Rear feed rolls 16 and front feed rolls 18 are rotatably supported and affixed to shaft 20 and 22, respectively.
  • feed roll plates 24 are provided, one of which engages each end of feed roll shafts 20 and 22.
  • Feed roll plates 24 act as supports for the feed roll shafts 20, 22 and at the same time transmit forces to the feed roll shafts 20, 22 to cause the engagement of feed rolls 16, 18 with the periphery of the platen 10.
  • Feed roll plates 24 are maintained at the appropriate spaced apart distance and orientation by paper feed bar 26.
  • Paper feed bar 26 extends entirely across the typewriter or printer and through the frame members 14. Near one end of the paper feed bar 26, a notch 28 (best seen in FIG. 2) is formed on the upper surface thereof for engaging the frame member 14. The notch 28 insures that bar 26 will be laterally positioned appropriately with respect to the frame 14.
  • the bar 26 extends through the frame opening 30 sufficiently to engage notch 28 with frame 14.
  • the opposite end of the paper feed bar 26 extends through a similar but longer dimensioned frame opening 32. The need for the longer dimension is to accommodate downward movement of the paper feed bar 26.
  • the paper feed bar 26 is notched at 34 and 36 (FIG. 1).
  • the notches 34 and 36 fit down over mating notches 38 on the feed roll plate 24.
  • the notch 36 formed into the paper feed bar 26 is substantially longer than the notch 34.
  • This differenoe in the dimension is to allow some downward movement of paper feed bar 26 prior to the interferring engagement with feed roll plate 24.
  • the dimension of notch 36 may be configured such that engagement with the feed roll plate 24 occurs at substantially the same time as or after engagement of notch 34 with paper feed roll plate 24, thereby causing a release of the engagement between the feed rolls 16 and 18 from the periphery of the platen 10 at approximately the same time.
  • Feed roll plates 24 have a bifurcated lower end thus forming a pair of fingers 23 and 25 (FIG. 3 and FIG. 4). These fingers 23, 25 extend down over a plate 40 which extends between and is supported by frame members 14. Plate 40 provides the structure against which force may be exerted to cause the biasing of the feed roll plates 24 to raise plates 24 toward platen 10.
  • Spring 42 is configured with two holes 44 near the ends thereof. The ends of spring 42 are inserted through apertures or holes 46 in feed roll plates 24 and will tend, due to the bend 48, to flex the ends upward engaging the upper surface of hole 46. Thus, the spring 42 will act to push the feed roll plates 24 upward, transmitting that bias to the feed rolls 16 and 18 until they engage the periphery of platen 10.
  • paper feed bar 26 is formed with outward dog leg or L-shaped extensions 50 depending from paper feed bar 26 near the ends of the bar 26 and spaced approximately the same distance as are the holes 44 in spring 42.
  • the paper feed bar 26 may be positioned onto the feed roll plates 24, engaging the notches 38, and the spring 42 flexed to insert the L-shaped appendages 50 through the holes 44.
  • the holes 44 will be retracted until the holes 44 are incapable of slipping over the L-shaped appendage 50 and thus will retain the paper feed bar 26, the feed roll plates 24 and the feed roll shafts 20 and 22 in assembly.
  • a simplified paper feed release lever 54 is provided to act in conjunction with the platen shaft 12.
  • Release lever 54 is formed to include not only a handle or other manual control element but also a camming surface 56 formed interiorly thereof.
  • Camming surface 56 is oriented such that a forward pull of the lever 54 against platen shaft 12 will overcome spring 42 and cause a relatively downward movement of lever 54 with respect to shaft 12 (FIG. 4). After the lever 54 has moved downward sufficiently, detent shaft 12 will clear cam 56 at point 57 and shaft 12 will then be positioned in the detenting depression 58. The vertical component of movement of lever 54 is transmitted to paper feed bar 26 by the engagement between notch 60 at the bottom of lever 54 and paper feed bar 26.
  • Notch 60 insures that the paper feed release lever 54 remains in engagement with paper feed bar 26.
  • the release of the paper feed assembly by withdrawing the paper feed rolls 16, 18 from engagement with the platen 10 may be continued on an indefinite basis by leaving the paper feed lever 54 in its detented forward position with shaft 12 engaged in the detenting depression 58. This insures that the distance between the top of the paper feed bar 26 and the platen shaft 12 is at its maximum stable distance.
  • the release of the paper feed assembly may be accomplished by the pushing backward of the paper feed release lever 54 to restore it to an undetented position relative to shaft 12 and allow the spring 42 to urge the paper feed plates 24 upward in response to the flexing of spring 42.
  • a further improvement for the engagement of spring 42 with the upper surface forming the hole 46 in feed roll plate 24 is the formation of a rounded area depending from holes 46 to form a localized or point bearing surface 70.
  • the bearing surface 70 engaging the spring 42 permits a more even distribution of force between feed rolls 16, 18 and the platen 10, together with an improved self-alignment of the feed roll assembly.
  • paper feed release lever 54 forward positively retracts the feed rolls 16, 18 from the platen 10 and the release of paper feed release lever 54 to its rearward position allows the spring 42 to bias the entire assembly upward until the feed rolls 16, 18 engage platen 10.
  • the paper feed roll assembly may be subassembled and then inserted in one operation into the frame 14 of the typewriter. Removal of the platen 10 from the typewriter will only allow such upward movement of the assembly as is permitted by the holes 30 and 32 inside frame 14. Thus, the assembly may not unintentionally become disengaged from the frame 14 upon the removal of the platen. This assembly will minimize parts and simplify assembly of the typewriter or printer, thereby reducing the cost and making the apparatus more reliable.

Landscapes

  • Handling Of Sheets (AREA)
  • Handling Of Cut Paper (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US06/626,362 1984-06-29 1984-06-29 Angular motion paper feed release system Expired - Fee Related US4592670A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US06/626,362 US4592670A (en) 1984-06-29 1984-06-29 Angular motion paper feed release system
JP60022148A JPS6114971A (ja) 1984-06-29 1985-02-08 印刷装置用紙送り装置
CA000478653A CA1221995A (en) 1984-06-29 1985-04-09 Angular motion paper feed release system
BR8502593A BR8502593A (pt) 1984-06-29 1985-05-30 Mecanismo com movimento angular para liberacao de avanco do papel
EP85107137A EP0167025B1 (en) 1984-06-29 1985-06-11 Angular motion paper feed release system
DE8585107137T DE3565494D1 (en) 1984-06-29 1985-06-11 Angular motion paper feed release system
ES544675A ES8607830A1 (es) 1984-06-29 1985-06-28 Un dispositivo de alimentacion o avance de papel para una impresora

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/626,362 US4592670A (en) 1984-06-29 1984-06-29 Angular motion paper feed release system

Publications (1)

Publication Number Publication Date
US4592670A true US4592670A (en) 1986-06-03

Family

ID=24510089

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/626,362 Expired - Fee Related US4592670A (en) 1984-06-29 1984-06-29 Angular motion paper feed release system

Country Status (7)

Country Link
US (1) US4592670A (ja)
EP (1) EP0167025B1 (ja)
JP (1) JPS6114971A (ja)
BR (1) BR8502593A (ja)
CA (1) CA1221995A (ja)
DE (1) DE3565494D1 (ja)
ES (1) ES8607830A1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936696A (en) * 1987-10-08 1990-06-26 Mannesmann Aktiengesellschaft Roller device for transporting recording supports in printers
US5042953A (en) * 1988-01-28 1991-08-27 Siemens Aktiengesellschaft Paper guide means for printer equipment
US5056944A (en) * 1989-06-14 1991-10-15 Ing. C. Olivetti & C., S.P.A. Paper pressing arrangement for typewriters
US6450714B2 (en) * 1998-09-25 2002-09-17 Fujitsu Takamisawa Component Limited Thermal printer with a movable platen guided by a pin

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939389A (en) * 1958-02-17 1960-06-07 Thompson Ramo Wooldridge Inc Marking device
US3581861A (en) * 1967-09-06 1971-06-01 Olivetti & Co Spa Paper guide structure
US3714893A (en) * 1972-03-15 1973-02-06 Weber Marking Systems Inc Rotary label printing machine with adjustable rotor cam for separating the printing couple
US4221489A (en) * 1978-11-06 1980-09-09 International Business Machines Corporation Self aligning paper feed roller assembly
US4342521A (en) * 1980-04-15 1982-08-03 Adlerwerke Vorm Heinrich Kleyer A.G. Paper feeding apparatus
US4364683A (en) * 1981-12-23 1982-12-21 International Business Machines Corporation Paper feed roller assembly for a typewriter or printer
US4437780A (en) * 1980-11-19 1984-03-20 U.S. Philips Corporation Cylindrical platen printer with improved paper guide
EP0108388A2 (de) * 1982-11-05 1984-05-16 Siemens Aktiengesellschaft Papiertransportvorrichtung für Druckeinrichtungen mit Endlospapier mit einer einzigen Papierandruckrolle
US4549826A (en) * 1983-06-01 1985-10-29 Siemens Aktiengesellschaft Paper feed apparatus for typewriters or business machines having a paper levelling gap disposed in the paper guidance channel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58205783A (ja) * 1982-05-26 1983-11-30 Kyushu Matsushita Denki Kk 印字機械における記録用紙の送り装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2939389A (en) * 1958-02-17 1960-06-07 Thompson Ramo Wooldridge Inc Marking device
US3581861A (en) * 1967-09-06 1971-06-01 Olivetti & Co Spa Paper guide structure
US3714893A (en) * 1972-03-15 1973-02-06 Weber Marking Systems Inc Rotary label printing machine with adjustable rotor cam for separating the printing couple
US4221489A (en) * 1978-11-06 1980-09-09 International Business Machines Corporation Self aligning paper feed roller assembly
US4342521A (en) * 1980-04-15 1982-08-03 Adlerwerke Vorm Heinrich Kleyer A.G. Paper feeding apparatus
US4437780A (en) * 1980-11-19 1984-03-20 U.S. Philips Corporation Cylindrical platen printer with improved paper guide
US4364683A (en) * 1981-12-23 1982-12-21 International Business Machines Corporation Paper feed roller assembly for a typewriter or printer
EP0108388A2 (de) * 1982-11-05 1984-05-16 Siemens Aktiengesellschaft Papiertransportvorrichtung für Druckeinrichtungen mit Endlospapier mit einer einzigen Papierandruckrolle
US4549826A (en) * 1983-06-01 1985-10-29 Siemens Aktiengesellschaft Paper feed apparatus for typewriters or business machines having a paper levelling gap disposed in the paper guidance channel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4936696A (en) * 1987-10-08 1990-06-26 Mannesmann Aktiengesellschaft Roller device for transporting recording supports in printers
US5042953A (en) * 1988-01-28 1991-08-27 Siemens Aktiengesellschaft Paper guide means for printer equipment
US5056944A (en) * 1989-06-14 1991-10-15 Ing. C. Olivetti & C., S.P.A. Paper pressing arrangement for typewriters
US6450714B2 (en) * 1998-09-25 2002-09-17 Fujitsu Takamisawa Component Limited Thermal printer with a movable platen guided by a pin

Also Published As

Publication number Publication date
ES8607830A1 (es) 1986-06-01
JPS6114971A (ja) 1986-01-23
EP0167025B1 (en) 1988-10-12
EP0167025A1 (en) 1986-01-08
ES544675A0 (es) 1986-06-01
DE3565494D1 (en) 1988-11-17
CA1221995A (en) 1987-05-19
BR8502593A (pt) 1986-02-04

Similar Documents

Publication Publication Date Title
EP0845429B1 (en) Automatic sheet feeding mechanism
US4742946A (en) Paper feed device for a printer
US4714243A (en) Paper tray for a printing device
US6135444A (en) Automatic sheet feeding mechanism
US4406727A (en) Manually-operated labeler
US4297045A (en) Paper feed system for a typewriter or the like
US4592670A (en) Angular motion paper feed release system
EP0082296B1 (en) Paper feed roll assembly for a typewriter or printer
US5156467A (en) Printer with media thickness adjustment of platen
JP3468559B2 (ja) 用紙取り出し係合器
US5915863A (en) Ink jet printer
US5375826A (en) Paper tray control of a sheet feeder having biased nip rollers cooperative with the positioning of a paper tray
US3042179A (en) Sheet fefding mechanism
US4708504A (en) Pinch roller assembly for sheet feeding
US4408917A (en) Paper guide mechanism in a printer
US5139354A (en) Printer
JP2731022B2 (ja) プリンタ
JPS58205783A (ja) 印字機械における記録用紙の送り装置
EP0266139B2 (en) Pressure roller actuating mechanism for a printer
EP0448272B1 (en) A document printer including an aligner mechanism for aligning a document within said printer
US6568803B2 (en) Print media handling and ejection system
JP2562303B2 (ja) プリンタの紙送り機構
US4043264A (en) Printing device
JP3050471B2 (ja) サーマルプリンタ
JP3189615B2 (ja) インクジェットプリンタ

Legal Events

Date Code Title Description
AS Assignment

Owner name: INTERNATIONAL BUSINESS MACHINES CORPORATION ARMONK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FRANK, EDGAR H.;KOMPLIN, STEVEN R.;REEL/FRAME:004281/0842

Effective date: 19840629

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: MORGAN BANK

Free format text: SECURITY INTEREST;ASSIGNOR:IBM INFORMATION PRODUCTS CORPORATION;REEL/FRAME:005678/0062

Effective date: 19910327

Owner name: IBM INFORMATION PRODUCTS CORPORATION, 55 RAILROAD

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL BUSINESS MACHINES CORPORATION;REEL/FRAME:005678/0098

Effective date: 19910326

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 19980603

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362